Which alternate upgrade for Inferno do you like the most?

I'm crazy about alternate units! Especially the Greater Demons! With their help, you can get a slight boost at the beginning and easily crush neutral units up to level 3! And when you gather a large army, it's better to use our veterans; defense is more important, and when they start getting swarmed, they can explode and deal some damage to the surrounding units. But with such high defense, even Greater Demons will be taken down before the battle even begins!